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 // Created on: 1998-06-17
 // Created by: data exchange team
 // Copyright (c) 1998-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _ShapeFix_Edge_HeaderFile
 #define _ShapeFix_Edge_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_Type.hxx>
 
 #include <Standard_Integer.hxx>
 #include <Standard_Transient.hxx>
 #include <ShapeExtend_Status.hxx>
 class ShapeConstruct_ProjectCurveOnSurface;
 class TopoDS_Edge;
 class TopoDS_Face;
 class Geom_Surface;
 class TopLoc_Location;
 class ShapeAnalysis_Surface;
 class ShapeBuild_ReShape;
 
 // resolve name collisions with X11 headers
 #ifdef Status
   #undef Status
 #endif
 
 //! Fixing invalid edge.
 //! Geometrical and/or topological inconsistency:
 //! - no 3d curve or pcurve,
 //! - mismatching orientation of 3d curve and pcurve,
 //! - incorrect SameParameter flag (curve deviation is greater than
 //! edge tolerance),
 //! - not adjacent curves (3d or pcurve) to the vertices.
 class ShapeFix_Edge : public Standard_Transient
 {
 
 public:
   //! Empty constructor
   Standard_EXPORT ShapeFix_Edge();
 
   //! Returns the projector used for recomputing missing pcurves
   //! Can be used for adjusting parameters of projector
   Standard_EXPORT occ::handle<ShapeConstruct_ProjectCurveOnSurface> Projector();
 
   Standard_EXPORT bool FixRemovePCurve(const TopoDS_Edge& edge, const TopoDS_Face& face);
 
   //! Removes the pcurve(s) of the edge if it does not match the
   //! vertices
   //! Check is done
   //! Use    : It is to be called when pcurve of an edge can be wrong
   //! (e.g., after import from IGES)
   //! Returns: True, if does not match, removed (status DONE)
   //! False, (status OK) if matches or (status FAIL) if no pcurve,
   //! nothing done
   Standard_EXPORT bool FixRemovePCurve(const TopoDS_Edge&               edge,
                                        const occ::handle<Geom_Surface>& surface,
                                        const TopLoc_Location&           location);
 
   //! Removes 3d curve of the edge if it does not match the vertices
   //! Returns: True, if does not match, removed (status DONE)
   //! False, (status OK) if matches or (status FAIL) if no 3d curve,
   //! nothing done
   Standard_EXPORT bool FixRemoveCurve3d(const TopoDS_Edge& edge);
 
   //! See method below for information
   Standard_EXPORT bool FixAddPCurve(const TopoDS_Edge& edge,
                                     const TopoDS_Face& face,
                                     const bool         isSeam,
                                     const double       prec = 0.0);
 
   //! See method below for information
   Standard_EXPORT bool FixAddPCurve(const TopoDS_Edge&               edge,
                                     const occ::handle<Geom_Surface>& surface,
                                     const TopLoc_Location&           location,
                                     const bool                       isSeam,
                                     const double                     prec = 0.0);
 
   //! See method below for information
   Standard_EXPORT bool FixAddPCurve(const TopoDS_Edge&                        edge,
                                     const TopoDS_Face&                        face,
                                     const bool                                isSeam,
                                     const occ::handle<ShapeAnalysis_Surface>& surfana,
                                     const double                              prec = 0.0);
 
   //! Adds pcurve(s) of the edge if missing (by projecting 3d curve)
   //! Parameter isSeam indicates if the edge is a seam.
   //! The parameter <prec> defines the precision for calculations.
   //! If it is 0 (default), the tolerance of the edge is taken.
   //! Remark : This method is rather for internal use since it accepts parameter
   //! <surfana> for optimization of computations
   //! Use    : It is to be called after FixRemovePCurve (if removed) or in any
   //! case when edge can have no pcurve
   //! Returns: True if pcurve was added, else False
   //! Status :
   //! OK   : Pcurve exists
   //! FAIL1: No 3d curve
   //! FAIL2: fail during projecting
   //! DONE1: Pcurve was added
   //! DONE2: specific case of pcurve going through degenerated point on
   //! sphere encountered during projection (see class
   //! ShapeConstruct_ProjectCurveOnSurface for more info)
   Standard_EXPORT bool FixAddPCurve(const TopoDS_Edge&                        edge,
                                     const occ::handle<Geom_Surface>&          surface,
                                     const TopLoc_Location&                    location,
                                     const bool                                isSeam,
                                     const occ::handle<ShapeAnalysis_Surface>& surfana,
                                     const double                              prec = 0.0);
 
   //! Tries to build 3d curve of the edge if missing
   //! Use    : It is to be called after FixRemoveCurve3d (if removed) or in any
   //! case when edge can have no 3d curve
   //! Returns: True if 3d curve was added, else False
   //! Status :
   //! OK   : 3d curve exists
   //! FAIL1: BRepLib::BuildCurve3d() has failed
   //! DONE1: 3d curve was added
   Standard_EXPORT bool FixAddCurve3d(const TopoDS_Edge& edge);
 
   Standard_EXPORT bool FixVertexTolerance(const TopoDS_Edge& edge, const TopoDS_Face& face);
 
   //! Increases the tolerances of the edge vertices to comprise
   //! the ends of 3d curve and pcurve on the given face
   //! (first method) or all pcurves stored in an edge (second one)
   //! Returns: True, if tolerances have been increased, otherwise False
   //! Status:
   //! OK   : the original tolerances have not been changed
   //! DONE1: the tolerance of first vertex has been increased
   //! DONE2: the tolerance of last vertex has been increased
   Standard_EXPORT bool FixVertexTolerance(const TopoDS_Edge& edge);
 
   Standard_EXPORT bool FixReversed2d(const TopoDS_Edge& edge, const TopoDS_Face& face);
 
   //! Fixes edge if pcurve is directed opposite to 3d curve
   //! Check is done by call to the function
   //! ShapeAnalysis_Edge::CheckCurve3dWithPCurve()
   //! Warning: For seam edge this method will check and fix the pcurve in only
   //! one direction. Hence, it should be called twice for seam edge:
   //! once with edge orientation FORWARD and once with REVERSED.
   //! Returns: False if nothing done, True if reversed (status DONE)
   //! Status:  OK    - pcurve OK, nothing done
   //! FAIL1 - no pcurve
   //! FAIL2 - no 3d curve
   //! DONE1 - pcurve was reversed
   Standard_EXPORT bool FixReversed2d(const TopoDS_Edge&               edge,
                                      const occ::handle<Geom_Surface>& surface,
                                      const TopLoc_Location&           location);
 
   //! Tries to make edge SameParameter and sets corresponding
   //! tolerance and SameParameter flag.
   //! First, it makes edge same range if SameRange flag is not set.
   //!
   //! If flag SameParameter is set, this method calls the
   //! function ShapeAnalysis_Edge::CheckSameParameter() that
   //! calculates the maximal deviation of pcurves of the edge from
   //! its 3d curve. If deviation > tolerance, the tolerance of edge
   //! is increased to a value of deviation. If deviation < tolerance
   //! nothing happens.
   //!
   //! If flag SameParameter is not set, this method chooses the best
   //! variant (one that has minimal tolerance), either
   //! a. only after computing deviation (as above) or
   //! b. after calling standard procedure BRepLib::SameParameter
   //! and computing deviation (as above). If <tolerance> > 0, it is
   //! used as parameter for BRepLib::SameParameter, otherwise,
   //! tolerance of the edge is used.
   //!
   //! Use    : Is to be called after all pcurves and 3d curve of the edge are
   //! correctly computed
   //! Remark : SameParameter flag is always set to True after this method
   //! Returns: True, if something done, else False
   //! Status : OK    - edge was initially SameParameter, nothing is done
   //! FAIL1 - computation of deviation of pcurves from 3d curve has failed
   //! FAIL2 - BRepLib::SameParameter() has failed
   //! DONE1 - tolerance of the edge was increased
   //! DONE2 - flag SameParameter was set to True (only if
   //! BRepLib::SameParameter() did not set it)
   //! DONE3 - edge was modified by BRepLib::SameParameter() to SameParameter
   //! DONE4 - not used anymore
   //! DONE5 - if the edge resulting from BRepLib has been chosen, i.e. variant b. above
   //! (only for edges with not set SameParameter)
   Standard_EXPORT bool FixSameParameter(const TopoDS_Edge& edge, const double tolerance = 0.0);
 
   //! Tries to make edge SameParameter and sets corresponding
   //! tolerance and SameParameter flag.
   //! First, it makes edge same range if SameRange flag is not set.
   //!
   //! If flag SameParameter is set, this method calls the
   //! function ShapeAnalysis_Edge::CheckSameParameter() that
   //! calculates the maximal deviation of pcurves of the edge from
   //! its 3d curve. If deviation > tolerance, the tolerance of edge
   //! is increased to a value of deviation. If deviation < tolerance
   //! nothing happens.
   //!
   //! If flag SameParameter is not set, this method chooses the best
   //! variant (one that has minimal tolerance), either
   //! a. only after computing deviation (as above) or
   //! b. after calling standard procedure BRepLib::SameParameter
   //! and computing deviation (as above). If <tolerance> > 0, it is
   //! used as parameter for BRepLib::SameParameter, otherwise,
   //! tolerance of the edge is used.
   //!
   //! Use    : Is to be called after all pcurves and 3d curve of the edge are
   //! correctly computed
   //! Remark : SameParameter flag is always set to True after this method
   //! Returns: True, if something done, else False
   //! Status : OK    - edge was initially SameParameter, nothing is done
   //! FAIL1 - computation of deviation of pcurves from 3d curve has failed
   //! FAIL2 - BRepLib::SameParameter() has failed
   //! DONE1 - tolerance of the edge was increased
   //! DONE2 - flag SameParameter was set to True (only if
   //! BRepLib::SameParameter() did not set it)
   //! DONE3 - edge was modified by BRepLib::SameParameter() to SameParameter
   //! DONE4 - not used anymore
   //! DONE5 - if the edge resulting from BRepLib has been chosen, i.e. variant b. above
   //! (only for edges with not set SameParameter)
   Standard_EXPORT bool FixSameParameter(const TopoDS_Edge& edge,
                                         const TopoDS_Face& face,
                                         const double       tolerance = 0.0);
 
   //! Returns the status (in the form of True/False) of last Fix
   Standard_EXPORT bool Status(const ShapeExtend_Status status) const;
 
   //! Sets context
   Standard_EXPORT void SetContext(const occ::handle<ShapeBuild_ReShape>& context);
 
   //! Returns context
   Standard_EXPORT occ::handle<ShapeBuild_ReShape> Context() const;
 
   DEFINE_STANDARD_RTTIEXT(ShapeFix_Edge, Standard_Transient)
 
 protected:
   occ::handle<ShapeBuild_ReShape>                   myContext;
   int                                               myStatus;
   occ::handle<ShapeConstruct_ProjectCurveOnSurface> myProjector;
 };
 
 #endif // _ShapeFix_Edge_HeaderFile

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